With reference to specifying the magnetic field, which of the following physical quantities is not an “element” of the earth’s magnetic field?

Magnetic dip

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Moment of the field

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Magnetic declination

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Horizontal component of the field

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Solution

The correct option is B
Moment of the field

There are three “elements” of the earth’s magnetic field. They are the magnetic dip, the magnetic moment, and the horizontal component of the magnetic field. These elements are used to specify the magnetic field on the surface of the earth. Magnetic moment is not an element of the earth’s magnetic field.

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